The sleep timer setting On HP LaserJet Enterprise 500 color MFP M575 Series printers is by default 11 minutes.  Below Steps show how to modify the sleep timer setting via control panel or EWS (Embedded Web Server).

Via Control Panel:

1. Via the printer’s control panel, select ADMINISTRATION
2. Select GENERAL SETTINGS
3. Select ENERGY SETTINGS
4. Select SLEEP TIMER SETTINGS

• Ensure  “Sleep / Auto Off” is enabled (checked)
• Adjust the time to desire value e.g. 60 minutes
• Click on SAVE to retain changes

Via EWS (Embedded Web Server):

1. Open EWS by using hostname or IP address of the printer
2. Click on General tab
3. Click on energy Settings
4. Adjust the value of “Sleep/Auto off after” field to desire value e.g. 60 minutes
5. Click apply to save the change